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High-strength high-damping magnesium alloy containing rare-earth elements

A technology of rare earth elements and high damping, which is applied in the field of high-strength and high-damping magnesium alloys and high-damping magnesium alloys to achieve the effects of improving alloy strength, refining grain size, and good strength

Active Publication Date: 2014-10-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-strength and high-damping magnesium alloy containing rare earth elements with a reasonable component ratio. After the alloy casting of the present invention is solution quenched and artificially aged, the alloy has high strength and relatively Good damping performance, the alloy can meet the needs of lightweight materials or parts manufacturing with high damping requirements

Method used

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  • High-strength high-damping magnesium alloy containing rare-earth elements
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Embodiment

[0030] The present invention provides 10 kinds of alloys with different component ratios. After casting, solution quenching and artificial aging, the alloy components, mechanical properties and damping performance indexes are shown in Table 1.

[0031] The preparation process of the alloy in the embodiment of the present invention is as follows: according to the 1-10 kinds of alloy components determined in Table 1, the components of the alloy are distributed, Mg is added in the form of pure magnesium, and other elements are added in the form of an intermediate alloy. Smelting in the interior, the melt is passed through Ar 2After degassing, pouring and cooling into ingots, the melting and pouring temperatures of the alloy are 780°C and 740°C respectively. Aging at ℃ / 16h to obtain a high-strength and high-damping magnesium alloy.

[0032] For the prepared high-strength and high-damping magnesium alloy, the damping performance test is carried out according to GB / T18258-2000;

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Abstract

A high-strength high-damping magnesium alloy containing rare-earth elements comprises the following components: gadolinium, yttrium, stannum, lithium and the balance of magnesium. A material prepared from the alloy disclosed by the invention, under the condition of room temperature, has an ultimate tensile strength (sigma b) larger than 250 MPa, an elongation percentage (delta) larger than 2%, damping performance (Q-1) higher than 0.01. Through reasonable alloying of components and ratio of the metal magnesium, the alloy crystal grain size can be effectively fined, the plasticity of the magnesium alloy is increased, meanwhile, the varieties and numbers of alloy elements in the alloy are effectively improved, a great amount of second phases are formed; after an alloy cast is subjected to solid solution strengthening and artificial aging, a great amount of strengthened second phases can be uniformly distributed inside grain and can be accumulated at boundary of grain; through the synergetic function, the alloy provided by the invention has relatively high damping performance and good strength.

Description

technical field [0001] The invention relates to a high-damping magnesium alloy, in particular to a high-strength and high-damping magnesium alloy containing rare earth elements, which can meet the requirements of light-weight materials or component manufacturing with high damping performance requirements. The invention belongs to the technical field of nonferrous metal material preparation. Background technique [0002] In recent years, the development of national defense industry and civilian industry has a very urgent demand for vibration and noise reduction technology. In the national defense industry, rocket and satellite failure analysis results show that about 2 / 3 of the failures are related to vibration and noise; during the long-term use of aircraft, cracks in the rudder, tail cover, and pitot tube breakage often occur due to vibration. Problems seriously affect the reliability and service life of aircraft; the vibration and noise reduction of naval ships and submar...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22F1/06
Inventor 张新明杨柳叶凌英唐昌平崔彬张骞谭军邓运来
Owner CENT SOUTH UNIV
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